The luminiferous aether theory held that light, understood as a wave, needed a physical medium to travel through, filling all of space including a vacuum, and that this medium had to be almost rigid to support light's high frequency while offering no detectable resistance to planets moving through it. Building on Christiaan Huygens's seventeenth century wave theory of light, nineteenth century physicists developed the aether idea to explain how a wave could cross empty space at all. The 1887 Michelson-Morley experiment looked for Earth's motion through the aether by comparing light's speed in different directions and found no difference whatsoever, a null result the aether theory could not explain. Einstein's 1905 special relativity showed the same physics could be derived without any aether, and the theory was abandoned. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Proposed YearSourced to the subject's own accountHuygens's Treatise on Light (1690) hypothesized light as a wave propagating through an aether; the specifically luminiferous (light-bearing) formulation was later developed through the nineteenth century, notably by Thomas Young and Augustin-Jean Fresnel with the transverse-wave insight. Proposed BySourced to the subject's own account FAQs
What was the luminiferous aether supposed to be like, and why was it dropped?
A weightless, undetectable medium for light, abandoned after Michelson-Morley found no effect and special relativity made it unnecessary.
In the 19th century the ether was treated as a universal substance that carried light and other electromagnetic waves, much as air carries sound. It was assumed to be weightless, transparent, frictionless and undetectable chemically or physically, yet to permeate all matter and space. The 1887 Michelson-Morley experiment, designed to detect Earth's motion through the ether, showed no such effect, which seriously weakened the idea. Once Einstein's special relativity of 1905 was generally accepted, with its assumption that the speed of light is a universal constant, the ether hypothesis was abandoned as unnecessary.
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Luminiferous aether theory held that light propagates through a stationary medium filling space, which the 1887 Michelson-Morley experiment failed to detect any evidence of. Einstein's 1905 special relativity superseded the aether explanation outright by postulating that the speed of light is the same in every inertial frame with no preferred medium required, eliminating the need for an aether rather than merely refining it.
Source Luminiferous Aether (Wikipedia)
Tested By
Source Luminiferous Aether (Wikipedia)
Sources
1. Luminiferous Aether (Wikipedia)
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